42results about How to "Small attenuation" patented technology

The invention discloses a deep sea cable fault accurate positioning method based on electromagnetic induction and transient characteristic analysis, and relates to deep sea electric power engineering. According to the technical scheme, the method comprises the steps of 1, signal excitation used for transmitting a signal source; 2, signal filtering is carried out to counteract geomagnetic background noise; 3, signal correction is carried out to solve the problems of modal aliasing and endpoint effect existing when a traditional EMD is used for processing complex signals; 4, signal feature extraction, wherein transient pulse features in the signals can be effectively enhanced; and step 5, fault positioning. The method is mainly used for non-intrusive fault detection of the power cable in the kilometer-level deep sea high-pressure environment, and high-precision fault point positioning is achieved.

The application provides a steam delivery pipeline leakage detection system, which comprises a metal conducting rod fixedly connected to the outer wall of a steam delivery pipeline, a sensor connected to the metal conducting rod, a signal analyzer electrically connected to the sensor, and a DCS control center electrically connected to the signal analyzer, and the sensor is used for collecting the vibration sound signal of the metal conducting rod. The steam delivery pipeline leakage detection system of the application can accurately and timely determine the leakage and the position of the leakage point by using the metal conducting rod connected to the steam delivery pipeline to transmit the vibration sound generated by the intense friction between the leakage medium and the pipeline wall, and the sound signal is not obviously attenuated in the transmission process due to the solid medium transmission, the transmission distance is long, and the sound signal is not easily interfered by other signals, the false positive rate of the leakage detection is effectively reduced, the operation and maintenance cost of the steam delivery pipeline is significantly reduced, and the industrial safety is improved.

The invention discloses a liquid cooling energy storage cabinet which comprises a main frame, the interior of the main frame is divided into an energy bin and an electric appliance bin which are mutually independent through a vertically-arranged partition plate, a battery rack is arranged in the energy bin, battery packs are detachably installed in the battery rack, a liquid cooling plate is tightly attached to the side face of each battery pack, and a flow channel is formed in each liquid cooling plate. The flow channels of the adjacent liquid cooling plates are connected in series through liquid cooling pipelines; an inlet and an outlet of the liquid cooling pipeline both extend to the electric appliance bin and are connected with an outlet and an inlet of the liquid cooling unit respectively, and the liquid cooling unit is fixed to a bottom plate of the electric appliance bin through a liquid cooling air conditioner support. Through the design that the liquid cooling plate is directly attached to the side face of the battery pack, the heat conduction path is extremely short, the advantages of high specific heat capacity and high heat conductivity of liquid are utilized, heat generated during charging and discharging of the battery can be rapidly and efficiently taken away, and the problem of low heat dissipation efficiency caused by low specific heat capacity and poor heat conductivity of air in air cooling is solved.

This utility model relates to the field of lithium-ion battery manufacturing and discloses a soft-pack lithium-ion battery and electronic product. The soft-pack lithium-ion battery includes: a cell body and an aluminum-plastic film shell for sealing the cell body. A plastic film heat-sealing strip is provided on the aluminum-plastic film shell. On the plastic film heat-sealing strip, the polypropylene layers on the surfaces of the bottom aluminum-plastic film and the top aluminum-plastic film are fused and sealed together. The plastic film heat-sealing strip seals the cell body in the cavity between the top and bottom aluminum-plastic films. Except for the ends where the tabs protrude, the inner and outer surfaces of the top and bottom aluminum-plastic films are exposed metal layers. The exposed metal layers are fused together metallurgically and, after cooling, form a sealed metal sealing strip located outside the plastic film heat-sealing strip layer.

This invention belongs to the field of back-contact battery technology, specifically relating to a back-contact battery and its battery assembly with a specific front-side structure. This specific front-side structure includes a tunneling oxide layer and a specifically doped amorphous silicon layer sequentially disposed on the front side of a silicon substrate. Within the specifically doped amorphous silicon layer, a low-doped amorphous silicon layer, a high-doped amorphous silicon layer, and an oxygen-doped amorphous silicon layer are sequentially disposed along the direction away from the tunneling oxide layer. The specifically doped amorphous silicon layer is doped with phosphorus (P) and contains hydrogen (H). The P doping concentration C1 in the low-doped amorphous silicon layer and the P doping concentration C3 in the oxygen-doped amorphous silicon layer are both lower than the P doping concentration C2 in the high-doped amorphous silicon layer. This specific front-side structure enables the back-contact battery to achieve an absorption rate exceeding 85% for incident light within 400 nm. The back-contact battery of this invention maintains good performance even after long-term exposure to ultraviolet light, improving the battery's UV reliability while achieving high transmittance and high battery efficiency.

The utility model discloses a lightning -resistant 5G base station antenna housing relates to 5G communication equipment protection technical field, including support frame, four evenly distributed connecting seat of support frame's outer surface fixedly connected with, the outer surface of support frame is located between two adjacent connecting seat fixedly connected with the conductive plate, the upper end fixedly connected with the protective cover of support frame, the upper end center of protective cover fixedly connected with the conductive seat, the upper end fixedly connected with the lightning rod of conductive seat, the utility model discloses a lightning rod, conductive seat, conductive strip, conductive plate and conductive column can effectively avoid the damage that the lightning strikes 5G antenna, simultaneously, the lightning rod, conductive seat, conductive strip, conductive plate and conductive column form multistage shunt structure, can avoid single point overload, and the wave -transmitting plate is cooperated with the honeycomb wave -transmitting grid, has reduced the attenuation that the antenna housing has caused 5G high frequency signal, can ensure the effective transmission of signal.

The invention relates to the field of detection devices, in particular to a gas suction pipeline type combustible gas concentration detection device which comprises a gas suction sampling pipeline structure and a combustible gas detection unit. The combustible gas detection unit comprises an infrared detection cavity, a spherical optical fiber emission light source, an optical fiber and a detection circuit assembly; the inspiration sampling pipeline structure comprises a plurality of inspiration sampling pipelines, and the inspiration sampling pipelines are respectively communicated with different protection areas and are used for extracting sampling gas of the corresponding protection areas. The spherical optical fiber emission light source with the sapphire glass shell and the vacuum cavity is adopted, interference of the external environment on infrared rays emitted by the lamp filament is reduced, the multiple optical fibers are welded to the outer side of the shell, stable and efficient conduction of multiple paths of infrared rays can be achieved, infrared signal attenuation is reduced, the detection circuit assembly is combined with the Beer-Lanbert law, and the detection precision is improved. And the concentration is calculated by accurately measuring the characteristic frequency of the emitted infrared rays, so that the accuracy and consistency of the detection result are further improved.

The application relates to an ultra-low-loss large-effective-area optical fiber, which comprises, from inside to outside along the radial direction of the optical fiber, a core layer, a first gradient layer, an inner cladding layer, a second gradient layer, a sunken cladding layer, a third gradient layer, a transition cladding layer, a fourth gradient layer and an outer cladding layer; the core layer is chlorine-boron co-doped or chlorine-fluorine co-doped silica and is not doped with germanium; the first gradient layer, the inner cladding layer, the second gradient layer, the sunken cladding layer, the third gradient layer, the transition cladding layer and the fourth gradient layer are all fluorine-boron co-doped silica; and the outer cladding layer is pure silica. The application can solve the optical fiber attenuation problem caused by the viscosity imbalance of the existing optical fiber structure while having ultra-low loss and large effective area.

This application relates to a submarine optical cable and its manufacturing method. Multiple stranded optical units and stranded reinforcing members are in contact with the outer surface of a central optical unit and are stranded around the central optical unit to form a cable core. Two stranded reinforcing members and one stranded optical unit form a clearance groove on the outer surface of the cable core. The outer surface of the stranded optical unit is the bottom of the clearance groove. This clearance groove in the cable core indicates a certain gap between the stranded reinforcing members and the stranded optical units, providing the stranded reinforcing members with sufficient tensile strength to prevent the optical units from breaking during the stranding process. It also prevents direct contact with water-blocking tape and copper tubing during subsequent production, reducing optical unit deformation and meeting the production requirements of water-blocking tape-wrapped submarine cables and submarine cables with conductive conductors. Furthermore, the stranding method of multiple stranded optical units and one central optical unit can meet the requirement of placing multiple optical fibers in a single submarine cable, facilitating subsequent splicing without damaging the spliced ​​optical fibers and reducing attenuation.

The invention discloses a low-attenuation radio frequency coaxial cable which comprises an inner conductor, an insulating layer arranged on the outer side of the inner conductor, an outer conductor arranged on the outer side of the insulating layer and a sheath arranged on the outer side of the outer conductor. The cable is characterized by further comprising a plurality of concave point structures which are arranged on the outer conductor and used for increasing the air volume ratio between the inner conductor and the outer conductor and reducing cable attenuation. According to the invention, a plurality of concave point structures are arranged on the outer conductor, concave parts in the concave point structures are concave inwards, concave points are arranged at the centers of the concave parts, the air volume ratio between the inner conductor and the outer conductor is increased through the concave parts, cable attenuation is reduced, the concave points are in contact with the insulating layer to form support, and under the coating of the outer conductor and the sheath, the cable can be prevented from being damaged. And the plurality of concave points extrude and nail the insulating layer, and particularly, when the size of the cable is relatively small, the possibility that the insulating layer rotates in the outer conductor can be effectively reduced.

This utility model relates to a battery holding device and a detection system. The holding device includes a base, a battery support assembly, and a composite motion mechanism for realizing the lifting and rotational movements of the battery. The composite motion mechanism includes a lifting shaft for lifting the battery along an axial direction and a rotating shaft for rotating the battery in a rotational direction. The rotating shaft is rotatably supported on the base via a first bearing arranged within the base. The lifting shaft and the rotating shaft are connected to each other such that the lifting shaft can rotate with the rotating shaft but can move independently along the axial direction relative to the rotating shaft. Using the holding device and detection system of this utility model, X-ray attenuation can be reduced, image quality can be improved, and battery detection can be achieved at a faster rate. Furthermore, the lifting and rotation of the battery can be achieved simultaneously through a single composite motion mechanism, resulting in a more compact and simple overall structure.

The application discloses an ultrasonic rolling assisted laser additive manufacturing method and device, and belongs to the technical field of additive manufacturing. The ultrasonic rolling system is fixed on the laser deposition device through a support, and a forming base plate is fixed in a cooling water tank, so that synchronous ultrasonic rolling and temperature regulation and control are realized on a deposited layer in an additive process. By applying ultrasonic vibration in a molten pool solidification stage, grains are refined, and internal defects are reduced. The rolling module adopts a roller type structure design, ensures effective ultrasonic transmission, utilizes the integrated ultrasonic vibration roller to apply high-frequency vibration pressure behind the molten pool, generates plastic deformation on the material in a high-temperature plastic state, reduces residual stress, improves surface roughness, densifies and optimizes the microstructure. Through water cooling temperature control, the influence of thermal accumulation of the deposited layer on the ultrasonic rolling layer is reduced, the interlayer organization consistency is improved, and the overall organization uniformity regulation and performance improvement of the laser additive manufacturing component are realized.

The utility model relates to a kind of irradiation crosslinking machine for cable processing, including crosslinking machine body, fixedly arranged on the irradiation box of crosslinking machine body, cable that penetrates the irradiation box, be located on the maintenance mechanism of crosslinking machine body, be located on the adjusting mechanism of irradiation box;The adjusting mechanism includes fixedly arranged on the drive component of irradiation box, be located on the rotating component of irradiation box, fixedly arranged on the irradiation lamp of rotating component.

The utility model relates to a cable, in particular to a high-power low-loss radio frequency cable for a chariot radar. The utility model aims to provide the high-power low-loss radio frequency cable for the chariot radar, and the cable has the functions of low attenuation, high power and external electromagnetic interference resistance, and has the characteristics of light weight and high flexibility. According to the technical scheme, the high-power low-loss radio frequency cable for the chariot radar is characterized by comprising a cable core, an inner shielding layer, a middle layer, an outer shielding layer and an outer protection layer, the cable core comprises a conductor, and a first insulating layer, a second insulating layer and a third insulating layer which sequentially wrap the conductor from inside to outside.

The invention relates to the technical field of small-current grounding line selection, and discloses a small-current grounding line selection method and system based on a CatBoost algorithm, and the method comprises the steps: firstly, collecting the zero-sequence voltage and zero-sequence current of each line through a data collection splitter, and transmitting the collected data to a line selection host through the data collection splitter; the line selection host trained by the CatBoost algorithm selects a faulty line according to the collected data, the data collection splitter preprocesses the collected data, converts a collected analog signal into a digital signal, and transmits the digital signal to the line selection host through an optical fiber. Data of various identification methods such as amplitude comparison and phase comparison, first half wave, power direction and higher harmonic are fused together, the fused data drive a fault line selection model, fault information in multiple aspects is fully utilized, various line selection criteria are integrated and complemented and fused with one another, the fault judgment capability is improved, and the method has wider adaptability.

The application relates to the technical field of electronic atomization, and more specifically to an atomization device and a power supply device thereof. The power supply device comprises a battery, a circuit board, a fixing assembly, a conducting piece and a blocking piece. The circuit board is provided with a first contact point and a second contact point which are arranged at intervals. The first contact point is used for electrically connecting with an atomizer, and the second contact point is used for electrically connecting with the battery. The circuit board is provided with a first matching structure. The fixing assembly is provided with a second matching structure which is connected with the first matching structure. The conducting piece comprises a first end and a second end which are oppositely arranged along the direction from the first contact point to the second contact point. The first end is connected with the first contact point. The blocking piece is movably arranged in a containing space and at least partially exposed from the containing space. The blocking piece covers the second contact point to block the electrically-conductive contact between the second end and the second contact point, so that the first contact point and the second contact point are electrically disconnected. The battery attenuation during the transportation of the atomization device is reduced, and the service life of the atomization device is prolonged.

The application discloses a method for scheduling electric buses considering the influence of charging facility capacity and battery attenuation, which simultaneously considers the influence of charging facility capacity and battery attenuation characteristics on a vehicle scheduling scheme, including a driving plan of the vehicle and a charging scheme, and on this basis, an electric bus scheduling model is constructed in combination with a time-of-use electricity price mechanism, and the objective function of the model is to minimize the total cost of an enterprise, including a bus vehicle use cost, a charging cost and a battery attenuation cost. The application can be used for formulating an electric bus scheduling scheme, and helps to reduce the operation cost of the enterprise and prolong the service life of the battery.

The application relates to a diaphragm auxiliary detection device and a performance detection system. The diaphragm auxiliary detection device comprises a reflecting plate, a diaphragm plate attached above the reflecting plate and a light source component arranged in a containing groove opened below the reflecting plate; the reflecting plate is provided with a light outlet hole, the diaphragm plate is provided with a diaphragm hole, and an adhesive is filled between the reflecting plate and the light source component; light emitted by a light source of the light source component is reflected to a diaphragm to be detected placed on the diaphragm hole through the adhesive, the light outlet hole and the diaphragm hole. The application solves the technical problems that the existing diaphragm performance detection technology is difficult to dynamically track diaphragm production changes, influences detection stability and is low in detection precision.

This application relates to a special optical fiber, comprising a core layer and an outer cladding layer arranged sequentially from the inside to the outside along the radial direction of the special optical fiber, wherein the core layer includes a silicon nitride layer. The special optical fiber provided by this application incorporates a silicon nitride layer, disposed within the outer cladding layer. Silicon nitride has excellent thermal conductivity, enabling rapid dissipation of heat accumulated within the core / cladding layer, preventing localized hotspots that could degrade fiber quality and increasing the damage threshold. Silicon nitride remains stable at temperatures above 1200°C in an inert atmosphere and is unlikely to react with other substances, completely solving the problem of polymer carbonization. In terms of mechanical and chemical protection, silicon nitride acts as a chemical barrier. The dense, non-porous structure of the silicon nitride film gives this special optical fiber resistance to salt spray and hydrogen sulfide corrosion. Silicon nitride is a more effective Compton scatterer than silicon dioxide, reducing gamma photons incident deep within the optical fiber and improving its irradiation performance.

The utility model relates to a cable, and specifically relates to a dynamic network Category 6 cable for a mechanical arm. The utility model aims to provide the dynamic network category 6 + cable for the mechanical arm, and the cable still has the advantages of low attenuation, high transmission rate and high-frequency support under the working condition of high-intensity movement, and has the characteristics of high flexibility, torsion resistance, tensile resistance and stable signal transmission. According to the technical scheme, the dynamic network Category 6 + cable for the mechanical arm is characterized by comprising a cable core, and an outer shielding layer, a belting layer and an outer protection layer which are sequentially coated outside the cable core from inside to outside, the cable core comprises a plurality of twisted pairs which are arranged in parallel along the length direction of the cable and are coated with inner shielding layers; the twisted pair wires adopt different twist pitches so as to reduce electromagnetic crosstalk between the twisted pair wires. The twisted pair wire comprises two twisted wires, and each wire comprises a conductor, and a first insulating layer, a second insulating layer and a third insulating layer which are sequentially coated on the conductor from inside to outside.

The invention discloses a novel polysulfonamide composite nanofiltration membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The method comprises the following steps: preparing a 2-chloro-4, 6-amino-[1, 3, 5]-triazine (CAT) amine monomer, cleaning an ultrafiltration base membrane, immersing the ultrafiltration base membrane in a CAT aqueous solution with a concentration of 2.0-10.0 g / L, adjusting the pH value of the solution to 8-13, immersing the ultrafiltration base membrane for 1-30 min, taking out the ultrafiltration base membrane, removing excess water on the surface of the ultrafiltration base membrane, immersing the ultrafiltration base membrane in an organic solvent containing a sulfonyl chloride organic monomer with a concentration of 3.0-15.0 g / L, carrying out an interface reaction, taking out the ultrafiltration base membrane after 5-20 min, washing the ultrafiltration base membrane, and drying the ultrafiltration base membrane. And performing post-treatment for 5-55 minutes at the temperature of 35-95 DEG C to obtain the triazine ring group polysulfonamide composite nanofiltration membrane. The prepared triazine ring amino polysulfonamide composite nanofiltration membrane has good separation performance and acid-resistant stability, and shows good application prospects.

This utility model discloses a piezoelectric film vibration detection sensor, belonging to the field of vibration detection technology. It includes a PVDF piezoelectric film sensing unit, which comprises a PVDF piezoelectric film substrate. An upper silver electrode layer and a lower silver electrode layer are respectively disposed on the upper and lower sides of the PVDF piezoelectric film substrate. A flexible substrate is adhesively bonded to the bottom of the lower silver electrode layer, and a signal conditioning module is disposed on one side of the bottom of the flexible substrate. The upper and lower surfaces of the PVDF piezoelectric film substrate are tightly bonded to the upper and lower silver electrode layers, respectively, achieving ohmic contact between the electrodes and the piezoelectric film. The upper and lower silver electrode layers collect the charge signals generated by the PVDF piezoelectric film substrate, resulting in high detection sensitivity. The electrical signals are then transmitted to the signal conditioning module, which amplifies weak charge signals, filters noise, performs analog-to-digital conversion, and analyzes the vibration amplitude and frequency characteristics in real time, completing the electromechanical conversion of the vibration signal. This facilitates the capture of minute and ultra-low frequency vibration signals, with fast response and low signal attenuation.

The invention relates to the technical field of numerical control attenuator structure design, in particular to a millimeter wave attenuator high and low temperature compensation circuit. Comprising a first control unit, a second control unit and a temperature compensation unit, by arranging the temperature compensation unit, when the introduced bias voltage rises, the threshold voltage of the first control unit and the second control unit is reduced, so that the on-resistance is reduced, the trend that the on-resistance is increased when the temperature rises is counteracted, and the on-resistance is kept unchanged as much as possible when the temperature rises; reference state insertion loss and attenuation of the attenuator are kept unchanged.

This application discloses a host structure and a smartwatch. The host structure includes a housing, a display screen, and a bottom cover. A cavity is formed between the display screen and the bottom cover, and an NFC component, a circuit board, and a battery are housed within the cavity. The NFC component is attached to the inner surface of the display screen. The circuit board is located below the NFC component and has a multi-layered mesh-like hollow structure. The battery is partially embedded within the hollow structure, forming a three-dimensional interlocking layout. The bottom cover has an independently operable SIM card cover. This application arranges the NFC component close to the inner surface of the display screen, and the circuit board uses a multi-layered hollow structure to form a three-dimensional interlocking with the battery, significantly improving space utilization. The independent SIM card cover on the bottom cover maintains the device's airtightness and simplifies SIM card replacement.

The application discloses a method for rapidly preparing a nanoparticle platinum electrocatalyst by a thermal shock method, and belongs to the field of electrochemical catalysts. The application aims at solving the problems of complex synthesis process, long production period of the existing nanoparticle platinum electrocatalytic electrode material, high energy consumption of hydrogen production by electrolysis of water by the existing industrial application catalyst and poor stability. The method comprises the following steps: 1, pretreatment of a conductive substrate; 2, loading a platinum source on the substrate; and 3, rapid heating. The application is used for the thermal shock method for rapidly preparing the nanoparticle platinum electrocatalyst.

This invention provides a light strip and an air conditioner unit incorporating it, relating to the field of air conditioner technology, and is designed to solve the problem of concentrated brightness in the nighttime indicator lights of existing air conditioner units. The light strip includes a light source and a light guide. The light guide is configured to receive light emitted from the light source and conduct it to the outside of the air conditioner unit. The light guide has an inner surface, an outer surface, and a light-emitting surface connecting the inner and outer surfaces. Along a direction perpendicular to the light-emitting direction of the light guide, an edge light guide, a central light guide, and an edge light guide are sequentially arranged on the inner and / or outer surfaces. The central light guide is planar, and the edge light guides have several concave dots. The light source is configured to emit light towards the central light guide. The air conditioner unit includes the aforementioned light strip. This invention enables the point light source to diffuse evenly, effectively solving the problem of concentrated brightness in the nighttime indicator lights of air conditioner units.

The present application relates to the technical fields of industrial CT measuring machine, especially to a traceable industrial CT forest ball calibrator device, comprising a base and measuring needles, the measuring needles in the device have high rigidity, when the calibrator device is traced by using a coordinate measuring machine, contact measurement is needed for each standard ball of the measuring needles to obtain the spatial coordinates of each standard ball of the calibrator device, the high rigidity of the measuring needles can reduce the deflection change of the measuring needles in the measurement process, which can be ignored compared with the test accuracy, and the reliability and repeatability of the traceability are ensured, and the projection of the standard ball of the first layer of step measuring needles in the front view direction does not overlap with the projection of the third layer of step measuring needle support seats in the same direction; the first layer and the second layer of steps have 8 and 4 threaded holes respectively, the threaded hole positions are staggered by 30°, so as to reduce the stacking number of the calibrator device in the front view direction projection, the rays attenuate on the path, and the beam hardening is reduced.

The high-voltage cable comprises a wire part and a connecting part, exposed metal electrodes are arranged at the two ends of the wire part respectively, one end of the wire part is used for being connected with a high-voltage power source, and the other end of the wire part is used for being attached to the connecting part. The metal electrodes are electrically connected through metal wires, and the metal wires are embedded in the insulator. The connecting part is provided with a conducting layer and an insulating layer, the conducting layer is divided into an imaging area and a connecting area, the imaging area is used for being attached to the crystal surface, and the connecting area is located on the outer side of the imaging area and electrically connected with the metal electrode at one end of the wire part; the insulating layer covers one side, deviating from the crystal, of the conductive layer; the conductive layer, the wire part and the insulating layer are compounded into a whole through conductive adhesive, and the conductive adhesive realizes electric connection between the conductive layer and the wire part; and the conductive layer or / and the insulating layer is made of an elastic material. The high-voltage cable can be in reliable contact with the surface of the crystal, and the method is suitable for the spherical CT detector with spliced modules and crystals arranged in an arc shape.

The utility model relates to a cable, in particular to a high-temperature-resistant flexible twisted-pair communication cable for a complete machine system. The utility model aims to provide a high-temperature-resistant flexible twisted-pair communication cable for a complete machine system. The cable has the characteristics of low attenuation, external electromagnetic interference resistance, light weight and high flexibility. According to the technical scheme, the high-temperature-resistant flexible twisted-pair communication cable for the complete machine system comprises a cable core, and a belting layer, an inner shielding layer, an outer shielding layer, a middle layer and an outer protection layer which sequentially wrap the cable core from inside to outside; the cable is characterized in that the cable core comprises a plurality of leads and a plurality of filling wires which are arranged in parallel along the length direction of the cable; each wire comprises a conductor, an insulating layer and a high-temperature colored tape layer, wherein the insulating layer and the high-temperature colored tape layer sequentially wrap the conductor.

This utility model discloses a passive signal filter for processing fire signal transmission in shielded rooms, belonging to the field of electromagnetic shielding technology. It includes paths A-A′ and B-B′; both paths A-A′ and B-B′ are equipped with cascaded common-mode suppression modules and differential-mode suppression modules. The common-mode suppression module consists of two common-mode chokes L1 and two feedthrough capacitors C1, while the differential-mode suppression module is a π-type low-pass filter structure composed of a differential-mode inductor L2 and a feedthrough capacitor C2. Through this method, this utility model possesses high reliability and safety, high signal fidelity, excellent electromagnetic compatibility, and high integration.